<template>
<div class="child">
  <div>求和为:{{ sum }}</div>
  <Hello/>
</div>
</template>

<script lang='ts' setup name='Child'>
import axios from "axios";
import {ref} from "vue"
let sum=ref(1)


</script>

<style scoped>
.child{
  background-color:skyblue;
}
</style>